ext3: Always set dx_node's fake_dirent explicitly.

commit d7433142b63d727b5a217c37b1a1468b116a9771 upstream.

(crossport of 1f7bebb9e911d870fa8f997ddff838e82b5715ea
by Andreas Schlick <schlick@lavabit.com>)

When ext3_dx_add_entry() has to split an index node, it has to ensure that
name_len of dx_node's fake_dirent is also zero, because otherwise e2fsck
won't recognise it as an intermediate htree node and consider the htree to
be corrupted.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
index ee184084ca427a08d58ec58d8b9266b3263751ca..827b5736a4f848af0c412d772c1a6f539941df6d 100644 (file)
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -1550,8 +1550,8 @@ static int ext3_dx_add_entry(handle_t *handle, struct dentry *dentry,
                        goto cleanup;
                node2 = (struct dx_node *)(bh2->b_data);
                entries2 = node2->entries;
+               memset(&node2->fake, 0, sizeof(struct fake_dirent));
                node2->fake.rec_len = ext3_rec_len_to_disk(sb->s_blocksize);
-               node2->fake.inode = 0;
                BUFFER_TRACE(frame->bh, "get_write_access");
                err = ext3_journal_get_write_access(handle, frame->bh);
                if (err)